Armed police enter Oxford Circus station on Friday after an incident caused the station to be cleared.
Photograph: Guy Bell/Rex/Shutterstock

Two men who handed themselves in to police over an incident that caused a mass evacuation at Oxford Circus tube station on Friday have been released without being arrested or charged.

British Transport Police are investigating if any offence was committed after panic erupted in the packed central London station.

Several people were injured and nine were taken to hospital. Armed police had received 999 calls reporting that shots had been fired.

Two men, aged 21 and 40, were interviewed on Saturday after attending a police station voluntarily, following a media appeal in which BTP said the incident was believed to have started when an altercation erupted between two men on the platform.

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A spokeswoman for the force said on Sunday: “There are no criminal proceedings against them. They have not been arrested or charged.”

Officers are still trawling through CCTV footage and speaking to witnesses in an attempt to make sense of what happened, but no further suspects are being sought.

The incident sparked panic among commuters and Black Friday shoppers in central London.

But about 90 minutes after responding, police said there was no evidence of any shots, casualties or suspects. The station was reopened, cordons removed and the area returned to normal.

Anyone with any information can contact BTP on 0800 40 50 40 or text 61016 with reference 405 of 24/11.